Converter-twyer.



E, A. 0. SMITH.'

CONVERTER TWYER.

APPLICATION rrmzn 111:0. 211. 111011.

1,007,149. Patented 001.31, 1911.

INVEN'IOR aim z af ATTORNEYS.

' citizen of the United States, residing at I main bards teen to twenty per cent. a

. It is the pa UNITED STA'lllBS PATENCI. OFFICE.

ELIAS A. C. SXITH. OI BLLTIXOBE. MARYLAND. ABSIONOB TO PEIRCE-BMI'LH CONVERTER COMPANY. A CORPORATION 01' DELAWARE.

CONVERTER-'I'WYZE.

0 lpeetleetlen at Letters Intent.

Patented Oct. an. an i.

Application Med December 29. 1909. Serial Io. 538,480.

To all whom it may mam-n.

Be it. known that I, ELIAS A. Siirr i, a

Baltimore, State of Maryland, have invented certain new and useful lin rovenicnts in Converter-'lwycrs; and I do iereby declare the following to be a full, clear, and exact description of the invention, I enable others skilled inthe art to which it appertains to make and use the same.

In the bessemerizing of copper matte, t

is the practice from time to time during the operation to insert a punch bar into the twyers from the outer end'thereof and past the usual Dyblie valve for the purpose-0f removing such obstructionsas may chance to enter the ,dischar "ends of the twyers from the'molten but The punch bar or drift bar commonly employed for this purpose is of an external diameter substantially equal. to that of the internal boreof thebody'portion of the twyers at-their disa 'charge ends; that, is,

. say of one and one-v tlfilltll inch bore, the ex-.;

where the twyers are ternal diameter. of

e punch bar. or drift bar is say one and one-sixteenth inches in that it will occupy substantially wntained therein. In practiee, it is found that, with the use of punch bars thus closely approximating in diameter the'bore' of the '-twyei-s t the'perforated end caps at the end of the lawyers-when the punchbar ordrift there isoonsiderable le'slka'g'e 'of'air in.o tiongthis leaka e in some instances, aiii ii ntin toas highiis rpose of my present invention to minimize this air leakage, so as to lessen its amount and'importance. a

In the accompanying drawinfis, .I have illustrated the means that I haye e this'purpose.

In said drawin Figure 1 represented sectional view 9 a portion of a copier matte converter at the twyer zone and i lustrates the application of my invention thereto. Fig.9 re resents on a larger scale, and

in section, a ractional view of some of the Qparts shown in Fig.1, and shows, in place,

a drift bar as used in the final step of clearlI lg the twycrs; Fig. 3 represents a sidetelesuch as will thevalve fitting by iced for appi'o iimationof the dimensions of the perii'iaiii bore of thc'twyer beyond.

vation of a portion of the converter at the twyer zone.-

Simihir letters of reference indicate similar parts throughout. the several views.

Referring to the drawings, A indicates the shell of the converter, suitably lined, as, for instance, with courses of brick a proximate to the shell and an inner lining made up of courses of magiicsito brick or chrome brick b, although it will be understood that-the invention, is -i ndependent of the particular character of the converter lining employed.

The twyers It may conveniently be sugplied withair from a bustle pipe C. or t e ke, suitably supported upon tlitfSliSlllllllIlg.

"ringsiD of the converter and whichco m.

muiiicate'inanyssuitable'way, as, for instai'ice, by the xihle, pipe--c, with-the fit, ting d be ted toand forming a continuation ofthe twyera 'At. the outer end of the litting d s connected t-he-Dyblie valve case E containing theballe, which subserves the usual function of'closing tlie o'uterend of the tw y'er against the csca during the bessemerizing operation, but which may be pushed aside and up into thepochpttot' I the act of inserting the punch bar or drift bar. c Ordinarily, the outer end of the Dyblie of air,' as'indieated, in Fig.1, when the' last is on valve case isscrew-threaded on its innersurface for the ternally screw-'td readed plug,- having -a. per-' fo'ration ofthe's'ame diameter as the inner bore of the main body portion B-of' the twy'er. For insti'ince, the diametm of this perforation, corresponding to the, here of urpose, of receiving anexthe main body portionotrthe twyer is say oiiettttdqnc-eignth inches, and the pane bar or drift bar used in connection therewith is ufranexternal diametenslightl smaller, say one and one-sixteenth 'fn'clies, it being found impracticable to have a closer foration and those of the punch bar to enable the latter-to work freely through the end cap, in the; usual practice, the interval between the two surfaces is nevertheless In spite Hulliciont to permit. the escape of a considera punch bar r drift bar making priurtieally through the perforation till! the action of the three-quarter inch punc r inner diameter of the mam body able portion of the blast when the punch bar is in use. To obviate this ditlirulty, l protidc' a cap piece for the outer end of the valve vase having a wrloration of less diameter than "it diameter of the bore of the main body portion of the twyer it. For instance. where the bore of the main body portion of the layer is say one and otteeighth int-hes, l mu make the diameter of the perforation o; the rap pie e l" threequarters of an meh. liy this expedient, I am enabled to use with-entire convenience,

a machine li with the internal walls of the perforation 1'. that is, a drift bar of substantially tlu'ee-quarters of an inch external dinuu-ter. 'lhis'closeness of lit is such that there is practically no leaka re of the blast lag the nuuclh tug operation, and, because of the lesser diameter-of the punch bar than the internal diameter of the main-body portion of the t-wyer B, the punch bar is entirel unhampered in its movement througi the twver.

Because of the lesser diameter of the punch bar, it may, in some instances, happen that at the termination of the blow some dight obstruction of a minor character may be present in the twyers, not dislodged b bar. In order to remove any such obstruction, I may, at the termination of the blow, or at any other time when the blast is cut otl and the twyers raised to a level above the slag line, remove the end caps F and insert another drift bar, as shown in Fig. 2, of a diameter .elosely approximating the portion of the twyers. The blast being cut oil at the time of the insertion of this punch bar of larger diameter, there is, of course, no 'loss of air by reason of its insertion and, as the accumulations which it is designed to recomplete clearance of the twyers before the.

beginning of a new blow or before the continuation of a temporarily interrupted blow, and without the losses of air blast that were incident to former practice.

it will be noted that the cap piere lf is provided with scre\\'-threads on its inner surface and that it is titted upon the outer screw-threaded end of the valve case I), so that, us will be apparent from Fig. 2, the drift bar G inserted in the final operation of clearing the twyers after the removal of the end cap will not come in contact with the threads of the valve case so as to break them down or upset them.

Having thus described my invention, what I claim is A blast twyer, provided at its outer end with a Dyblie val ve and its easing having a ren'iovable cap, the main bore of the cas ng being in alinement with and of the same diameter as the bore of the twyer, and said cap having a perforation of but slightly less diameter than that of the twyer; whereby, during-the continuance of the blast, a punch bar ma be' employed making a. machine [it .\viti sal'd perforation andtapproximately but loosely fitting the bore of.

the twyer, and whereby, on removing the cap during interruption of the blow, a second punch bar may be employed still more nearl fitting the bore of the twyer; substantial y as described.

In testimon whereof I afiix my signature, in presence 0 two witnesses.

' ELIAS A. (J; SMITH. Witnesses:

M. K. Tom), Enwm W. Rouse, Jr.

Gupta! et thtl patut my be obtatned tor the cents each, by addressing the f (lommtntoner o1 rateatl,

, Washington, D. 0.". 

